Constant-temperature solid-state battery system

Abstract

The invention provides a constant-temperature solid-state battery system. The constant-temperature solid-state battery system comprises a solid-state battery module; the at least one heating module is connected with the solid-state battery module and is used for increasing the temperature of the solid-state battery module; the battery management system is connected with the solid-state battery module and the at least one heating module; when the battery management system works, the working state of the solid-state battery module is monitored, and according to the working state of the solid-state battery module, the at least one heating module is controlled to increase the temperature of the solid-state battery module or the solid-state battery module is controlled to reduce the power so as to reduce the temperature. According to the constant-temperature solid-state battery system disclosed by the invention, the temperature of the solid-state battery system can be kept in an optimal range, so that a battery can better exert the activeness of a material, the power and the input and output characteristics of a battery body are improved, and the solid-state battery has a wider application scene.

Description

Technical Field

[0001] The present application relates to the field of solid-state batteries, and in particular to a constant temperature solid-state battery system. Background Art

[0002] In recent years, power batteries have promoted the rapid development of electric vehicles with their advantages of long life, no pollution, and low cost. However, the energy density and safety issues of power batteries have seriously troubled the development of the industry. Solid-state batteries can achieve higher energy density applications because they can solve the safety issues of liquid batteries. However, solid-state batteries use solid electrolytes, which greatly reduces the input and output capabilities of low-temperature currents and the power at room temperature. In addition, due to temperature fluctuations, the performance of the battery cannot be stably input and output, resulting in the inability to output performance on demand when the vehicle is in use. This will become a bottleneck in both vehicle and energy storage applications.

[0003] Based on this, the present application provides a constant temperature solid-state battery system, which keeps the temperature of the solid-state battery system within an optimal range, which is conducive to the battery to better exert the activity of the material, so as to improve the power and input and output characteristics of the battery body, and allow the solid-state battery to have a broader application scenario. Summary of the invention

[0004] The present application provides a constant temperature solid-state battery system that can maintain the temperature of the solid-state battery system within an optimal range, which is conducive to the battery to better exert the activity of the material, thereby improving the power and input-output characteristics of the battery body, and allowing the solid-state battery to have a broader application scenario.

[0005] The present application provides a constant temperature solid-state battery system, comprising: a solid-state battery module; at least one heating module connected to the solid-state battery module and used to increase the temperature of the solid-state battery module; a battery management system connected to the solid-state battery module and the at least one heating module, wherein the battery management system monitors the working state of the solid-state battery module and controls the at least one heating module to increase the temperature of the solid-state battery module or controls the solid-state battery module to reduce power and thus reduce temperature according to the working state of the solid-state battery module.

[0006] In some embodiments of the present application, the temperature increasing module is configured to charge and discharge the solid-state battery module to increase the temperature.

[0007] In some embodiments of the present application, the temperature increasing module includes an energy storage structure, which is configured to absorb and release the current of the solid-state battery module.

[0008] In some embodiments of the present application, the energy storage structure includes an inductor and a capacitor connected in series, wherein two ends of the inductor are respectively connected to two stages of the solid-state battery module, and two ends of the capacitor are respectively connected to two stages of the solid-state battery module.

[0009] In some embodiments of the present application, the at least one temperature increasing module is connected in parallel with the solid-state battery module when not in operation, and the at least one temperature increasing module is connected in series with the solid-state battery module when in operation.

[0010] In some embodiments of the present application, when there are multiple temperature increasing modules, the temperature increasing modules are connected in parallel.

[0011] In some embodiments of the present application, the battery management system includes a monitoring module for monitoring the working status of the solid-state battery module and a control module for controlling the solid-state battery module and the at least one temperature increasing module.

[0012] In some embodiments of the present application, the working state of the solid-state battery module includes temperature.

[0013] In some embodiments of the present application, when the temperature of the solid-state battery module is lower than a first temperature threshold, the battery management system controls the at least one heating module to increase the temperature of the solid-state battery module; when the temperature of the solid-state battery module is higher than a second temperature threshold, the battery management system controls the solid-state battery module to reduce power and thus reduce temperature.

[0014] In some embodiments of the present application, when the battery management system controls the temperature increasing module to increase the temperature of the solid-state battery module, the temperature of the solid-state battery module increases at an average rate of 3 to 5 degrees Celsius per minute.

[0015] The constant temperature solid-state battery system described in the present application can maintain the temperature of the solid-state battery system within an optimal range through the cooperation of the heating module and the battery management system, which is conducive to the battery to better exert the activity of the material, thereby improving the power and input-output characteristics of the battery body, and allowing the solid-state battery to have a broader application scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following figures describe in detail the exemplary embodiments disclosed in this application. The same reference numerals represent similar structures in several views of the drawings. Those skilled in the art will understand that these embodiments are non-limiting, exemplary embodiments, and the drawings are only for the purpose of illustration and description, and are not intended to limit the scope of this application. Other embodiments may also accomplish the inventive intent in this application. It should be understood that the drawings are not drawn to scale.

[0017] in:

[0018] Figure 1 and Figure 2 This is a schematic diagram of the structure of the constant temperature solid-state battery system described in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following description provides specific application scenarios and requirements of the present application, with the purpose of enabling those skilled in the art to make and use the content in the present application. It will be apparent to those skilled in the art that various local modifications to the disclosed embodiments are apparent, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the present application. Therefore, the present application is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0020] The technical solution of the present invention is described in detail below in conjunction with the embodiments and drawings.

[0021] Figure 1 and Figure 2 This is a schematic diagram of the structure of the constant temperature solid-state battery system described in an embodiment of the present application.

[0022] The present application provides a constant temperature solid-state battery system 100, referring to Figure 1 and Figure 2 As shown, the constant temperature solid-state battery system 100 includes: a solid-state battery module; at least one heating module connected to the solid-state battery module, for increasing the temperature of the solid-state battery module; a battery management system (BMS), connecting the solid-state battery module and the at least one heating module, wherein the battery management system monitors the working state of the solid-state battery module and controls the at least one heating module to increase the temperature of the solid-state battery module or controls the solid-state battery module to reduce power and thus reduce temperature according to the working state of the solid-state battery module.

[0023] In some embodiments of the present application, the solid-state battery module includes one or more solid-state batteries, and the multiple solid-state batteries can be connected in series or in parallel. The total voltage of the solid-state battery module is consistent with the sum of the voltages of individual solid-state batteries in the multiple solid-state batteries connected in series.

[0024] In some embodiments of the present application, the solid-state battery module includes but is not limited to on-board power batteries for new energy vehicles, batteries for energy storage, and power batteries for aerospace use. In addition to solid-state battery modules, the technical solution of the present application can also be applied to other electrochemical energy storage battery systems such as liquid lithium-ion battery systems, semi-solid lithium-ion battery systems, all-solid lithium-ion battery systems, and sodium-ion battery systems.

[0025] In some embodiments of the present application, the number of the temperature increasing module may be one (refer to Figure 1) or more (reference Figure 2 ). In some embodiments of the present application, reference is made to Figure 2 As shown, when there are multiple heating modules, the heating modules are connected in parallel. Using multiple heating modules in parallel can reduce the risk of excessive current in a single heating module.

[0026] In some embodiments of the present application, the multiple temperature increasing modules can work individually or together. Specifically, the battery management system can control a single temperature increasing module among the multiple temperature increasing modules to work individually or control the multiple temperature increasing modules to work together.

[0027] In some embodiments of the present application, when the at least one temperature increasing module is not working, it is connected in parallel with the solid-state battery module, which does not affect the normal operation of the solid-state battery module; when the at least one temperature increasing module is working, it is connected in series with the solid-state battery module (changing from a parallel structure to a series structure).

[0028] In some embodiments of the present application, the temperature increasing module is configured to charge and discharge the solid-state battery module to increase the temperature. During the charging and discharging process of the solid-state battery module, the current passes through the solid-state battery module to increase the internal resistance of the solid-state battery module to increase the temperature. The solid-state battery module can be charged and discharged repeatedly.

[0029] Specifically, in some embodiments of the present application, the temperature increasing module includes an energy storage structure, and the energy storage structure is configured to absorb and release the current of the solid-state battery module when the solid-state battery is charged and discharged. When the temperature increasing module is working, it is connected in series with the solid-state battery module to form a current loop, and the current can flow through the temperature increasing module and the solid-state battery module repeatedly.

[0030] In some embodiments of the present application, the energy storage structure includes an inductor and a capacitor connected in series, the two ends of the inductor are respectively connected to the two poles (positive and negative poles) of the solid-state battery module, and the two ends of the capacitor are respectively connected to the two poles (positive and negative poles) of the solid-state battery module. The main functions of the capacitor and the inductor are to adjust the frequency and select the frequency, and the solid-state battery module is input and output with appropriate current and frequency through the adjustment of the capacitor and the inductor.

[0031] In some embodiments of the present application, the battery management system includes a monitoring module for monitoring the working state of the solid-state battery module and a control module for controlling the solid-state battery module and the at least one heating module. The battery management system can be directly connected to the solid-state battery module and the at least one heating module through a circuit or through signal communication.

[0032] In some embodiments of the present application, the monitoring module collects the working status of the solid-state battery module in real time and feeds it back to the control module, and the control module determines whether it is necessary to control the heating module and the solid-state battery module according to the received working status.

[0033] In the technical solution of the present application, the battery management system can monitor the working state of the solid-state battery module in real time, and control the at least one heating module to increase the temperature of the solid-state battery module or control the solid-state battery module to reduce power and thus reduce temperature when necessary according to the monitoring results, so as to keep the temperature of the solid-state battery module within a suitable temperature range. It should be noted that the "constant temperature" described in this application does not mean an absolute constant temperature with a constant temperature, but refers to a relative constant temperature within a smaller range. This smaller temperature range is generally higher than room temperature. Specifically, it can be set according to the optimal operating temperature of the solid-state battery module to provide the best working environment for the solid-state battery module and improve the electrochemical properties of the solid-state battery module. In some embodiments, the temperature range is, for example, 40 degrees Celsius to 80 degrees Celsius.

[0034] In some embodiments of the present application, the working state of the solid-state battery module includes temperature.

[0035] In some embodiments of the present application, when the temperature of the solid-state battery module is lower than the first temperature threshold, the battery management system controls the at least one heating module to increase the temperature of the solid-state battery module; when the temperature of the solid-state battery module is higher than the second temperature threshold, the battery management system controls the solid-state battery module to reduce power and thus reduce temperature. The first temperature threshold is generally approximately the same as or slightly higher than the lower limit of the optimal operating temperature range of the solid-state battery module. For example, when the optimal operating temperature range of the solid-state battery module is 40 degrees Celsius to 80 degrees Celsius, the first temperature threshold can be set to 40 degrees Celsius, 41 degrees Celsius, 42 degrees Celsius or 43 degrees Celsius, etc. This is because the heating module responds to the temperature increase of the solid-state battery module in a relatively timely manner, so the heating module can be started again when it approaches or touches the lower limit of the optimal operating temperature range of the solid-state battery module. The second temperature threshold is generally lower than the upper limit of the optimal operating temperature range of the solid-state battery module to a certain extent. For example, when the optimal operating temperature range of the solid-state battery module is 40 degrees Celsius to 80 degrees Celsius, the second temperature threshold can be set to 75 degrees Celsius, 72 degrees Celsius, 70 degrees Celsius or 65 degrees Celsius, etc. This is because the cooling response speed of the solid-state battery module after reducing the power is relatively slow, so it is necessary to reduce the power of the solid-state battery module in advance before reaching the upper limit of the optimal operating temperature range of the solid-state battery module. This method can better maintain the temperature of the solid-state battery module in the optimal range and ensure that the temperature of the solid-state battery module does not exceed this range.

[0036] Specifically, in some embodiments of the present application, when the battery management system controls the temperature increasing module to increase the temperature of the solid-state battery module, the temperature of the solid-state battery module increases at an average rate of 3 to 5 degrees Celsius per minute. The temperature of the solid-state battery module increases at a speed that is first fast and then slow.

[0037] Specifically, in some embodiments of the present application, when the battery management system controls the solid-state battery module to reduce power, the power of the solid-state battery module is reduced at a uniform rate of 10% to 30%.

[0038] In some embodiments of the present application, after the temperature of the solid-state battery module is started and the temperature of the solid-state battery module is raised to the center of the optimal operating temperature range of the solid-state battery module (e.g., 60 degrees Celsius), the temperature rising module is turned off and the temperature rising is stopped. Similarly, after the power of the solid-state battery module is controlled to be reduced and the temperature of the solid-state battery module is lowered to the center of the optimal operating temperature range of the solid-state battery module (e.g., 60 degrees Celsius), the power of the solid-state battery module is stopped from being reduced.

[0039] The constant temperature solid-state battery system described in the present application can maintain the temperature of the solid-state battery system within an optimal range through the cooperation of the heating module and the battery management system, which is conducive to the battery to better exert the activity of the material, so as to improve the power and input and output characteristics of the battery body, and allow the solid-state battery to have a broader application scenario; significantly improve the electrochemical performance and stability of the solid-state battery module, broaden the adaptability of high-energy density solid-state batteries, and realize wider market applications; the constant temperature solid-state battery system of the present application has a simple structure, high controllability, and low cost.

[0040] In summary, after reading the contents of this application, those skilled in the art will appreciate that the aforementioned application contents may be presented only in an exemplary manner and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that this application is intended to encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are within the spirit and scope of the exemplary embodiments of this application.

[0041] It should be understood that the term "and / or" used in this embodiment includes any or all combinations of one or more of the associated listed items. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to another element, or there can also be intermediate elements.

[0042] It should also be understood that the terms "comprising", "containing", "including" or "comprising", when used in this application document, indicate the presence of the recorded features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof.

[0043] It should also be understood that although the terms first, second, third, etc. can be used to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, without departing from the teachings of the present application, the first element in some embodiments can be referred to as the second element in other embodiments. The same reference numerals or the same reference signs represent the same elements throughout the specification.

[0044] In addition, the present specification describes exemplary embodiments by reference to idealized exemplary cross-sectional views and / or plan views and / or stereograms. Therefore, differences from the illustrated shapes due to, for example, manufacturing techniques and / or tolerances are foreseeable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but should include deviations in shapes caused by, for example, manufacturing. Therefore, the regions shown in the figures are schematic in nature, and their shapes are not intended to illustrate the actual shapes of the regions of the device nor to limit the scope of the exemplary embodiments.

Claims

1. A constant temperature solid-state battery system, characterized in that: include: Solid-state battery modules; at least one temperature increasing module connected to the solid-state battery module and used to increase the temperature of the solid-state battery module; A battery management system is connected to the solid-state battery module and the at least one heating module. When the battery management system is in operation, it monitors the working state of the solid-state battery module and controls the at least one heating module to increase the temperature of the solid-state battery module or controls the solid-state battery module to reduce power and thus reduce temperature according to the working state of the solid-state battery module.

2. The constant temperature solid-state battery system according to claim 1, characterized in that: The temperature increasing module is configured to charge and discharge the solid-state battery module to increase the temperature.

3. The constant temperature solid-state battery system according to claim 2, characterized in that: The temperature increasing module includes an energy storage structure configured to absorb and release the current of the solid-state battery module.

4. The constant temperature solid-state battery system according to claim 3, characterized in that: The energy storage structure includes an inductor and a capacitor connected in series, wherein two ends of the inductor are respectively connected to two poles of the solid-state battery module, and two ends of the capacitor are respectively connected to two poles of the solid-state battery module.

5. The constant temperature solid-state battery system according to claim 1, characterized in that: The at least one temperature increasing module is connected in parallel with the solid-state battery module when not in operation, and is connected in series with the solid-state battery module when in operation.

6. The constant temperature solid-state battery system according to claim 1, characterized in that: When there are multiple temperature increasing modules, the temperature increasing modules are connected in parallel.

7. The constant temperature solid-state battery system according to claim 1, characterized in that: The battery management system includes a monitoring module for monitoring the working state of the solid-state battery module and a control module for controlling the solid-state battery module and the at least one temperature increasing module.

8. The constant temperature solid-state battery system according to claim 1, characterized in that: The working state of the solid-state battery module includes temperature.

9. The constant temperature solid-state battery system according to claim 8, characterized in that: When the temperature of the solid-state battery module is lower than a first temperature threshold, the battery management system controls the at least one heating module to increase the temperature of the solid-state battery module; when the temperature of the solid-state battery module is higher than a second temperature threshold, the battery management system controls the solid-state battery module to reduce power and thus reduce temperature.

10. The constant temperature solid-state battery system according to claim 8, characterized in that: When the battery management system controls the temperature increasing module to increase the temperature of the solid-state battery module, the temperature of the solid-state battery module increases at an average rate of 3 to 5 degrees Celsius per minute.

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